ASTM A179 Seamless Steel Pipe
Outside Diameter (OD): 3.2 mm to 76.2 mm (1/8 inch to 3 inches)
Wall Thickness (WT): 0.4 mm
Manufacturing Technique： Seamless (Hot Finished) and Cold Drawn
Surface Treatment： Varnish Coated or Black Painted
ASTM A179 seamless steel pipe, with its excellent thermal conductivity, corrosion resistance, and seamless structure, has become a core material for heat exchange equipment and is widely used in petrochemical, power, and other fields. Its low carbon content ensures strength and ductility, while ASTM standards guarantee stability under high temperature and pressure.
Standard：ASTM A179 / ASTM A179M / SA179
Outside Diameter (OD): 3.2 mm to 76.2 mm (1/8 inch to 3 inches)
Wall Thickness (WT): 0.4 mm
Manufacturing Technique： Seamless (Hot Finished) and Cold Drawn
Surface Treatment： Varnish Coated or Black Painted
Packaging： Bundled, with Plain Ends (PE), and Packed in Seaworthy Bags.
Inspection & Certification： Mill Test Certificates provided according to EN 10204 3.1 or EN 10204 3.2.
Chemical Composition
| Element | Heat Analysis (%) (Maximum) | Product Analysis (%) (Maximum) |
|---|---|---|
| Carbon (C) | 0.06 - 0.18 | 0.06 - 0.18 |
| Manganese (Mn) | 0.27 - 0.63 | 0.25 - 0.66 |
| Phosphorus (P) | 0.035 | 0.040 |
| Sulfur (S) | 0.035 | 0.040 |
Mechanical Properties:
|
Tensile strength Loading Ksi(Mpa) |
Yield strength Loading Ksi(Mpa) |
Elongation(50mm)% |
Hardness |
|
≥47(325) |
≥26(180) |
≥35 |
≤72HRB |
Manufacturing Process:
- The ASTM A179 seamless steel pipe must be seamless and cold-drawn. After the final cold drawing, they must undergo heat treatment at 1200 degrees Fahrenheit (650 degrees Celsius) or higher.
Surface Condition:
The finished pipes should be free of peeling; small amounts of oxides are not considered peeling.
Applications:
- Suitable for the manufacture of seamless cold-drawn low-carbon steel tubes with minimum wall thickness for heat exchangers, condensers, and similar heat transfer equipment.
- Outer diameters range from 1/8 inch to 3 inches (3.2 to 76.2 mm). However, tubes with outer diameters and wall thicknesses smaller than this range may also be applicable. For tubes with an outer diameter less than 1/8 inch (3.2 mm) or a wall thickness less than 0.015 inch (0.4 mm), the relevant mechanical property requirements may not apply.
FAQ
Q: What are the differences between A179 seamless steel pipes and other similar standard steel pipes (such as A192)?
A: Although both A179 and A192 are seamless steel pipes used in heat exchange equipment, they differ slightly in chemical composition and applicable environments. A179 steel pipes are more focused on applications under low-temperature conditions, such as condensers, while A192 steel pipes are designed for higher-temperature boiler environments. Users should choose the most suitable standard based on specific operating conditions.
Q: What factors influence the price of A179 seamless steel pipes?
A: Prices are generally affected by factors such as raw material costs, manufacturing processes, and market supply and demand. For example, cold-drawn steel pipes may be more expensive than hot-rolled ones because the former requires more processing steps. Transportation and inventory management also affect the final cost. With a limited budget, users can find cost-effective options by comparing quotations from different suppliers, but must ensure that the product quality meets standards.
Q: How to maintain and extend the service life of A179 seamless steel pipes?
A: Regular inspection and cleaning are key. During operation, scale or corrosion products may accumulate on the steel pipes, affecting heat exchange efficiency. It is recommended to develop a maintenance plan based on the operating environment, such as using chemical cleaning agents to remove deposits. Avoid overloading or sudden temperature changes to reduce the risk of stress corrosion.
ASTM A179 seamless steel pipe, as a standardized industrial material, has become an important component of many industries due to its reliable performance and wide range of applications. By understanding its characteristics, manufacturing process, and practical applications, users can better utilize this material to improve equipment efficiency and durability. If you have further questions, it is recommended to consult a professional engineer or refer to relevant standard documents for more detailed guidance.
Email: judesteel@juqing.hk
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